Feeds to use

I have been growing a few plants au-naturel...one that i did start under lights has now started to sport the illusive white whispy hairs.
Up till now i have been feeding it a multi-purpose feed, my question is, now that the buds are begining to form should i change to a high potash feed or continue on as i have been ?
thanx in advance.

should flush the plants ( put them in your bathtub and give them water equalling 3 times the volume of medium. ie 2 gallon pot, flush with 6 gallon water)

this to clean out the old fertilizer from the soil\medium. this will also help you avoid PH problems\salt buildup later

cannabis uses lots less nitrogen when flowering has started and more P & K so should switch to a bloom fertilizer of your choice.

thanks alot, think i`ve got some miriacle grow b/f knocking about.